Sunday, April 16, 2006

SECTION 3 LESSON 51. Display the employee's last name and employee number along with the manager's last name and manager number. Label the columns:Employee, Emp#, Manager, and Mgr#, respectively. ----select e.last_name "Employee",e.employee_id "Emp #",m.manager_id "Mgr #",m.last_name "Manager" from employees e,employees m where e.employee_id=m.manager_id 2. Modify question 1 to display all employees and their managers, even if the employee does not have a manager. Order the list alphabetically by the last name of the employee.

3. Display the names and hire dates for all employees who were hired before their managers, along with their managers' names and hire dates. Label the columns Employee, Emp Hired, Manager, and Mgr Hired, respectivelyd---- select e.first_name' 'e.last_name "Employee",e.hire_date "Emp Hire",m.first_name' 'm.last_name "Manager",m.hire_date "Mgr Hire"from employees e,employees mwhere e.manager_id=m.employee_id and e.hire_date4. Finish this code to produce all possible combinations of rows from both tables:SELECT e.last_name, e.department_id, d.department_name ----SELECT e.last_name, e.department_id, d.department_name from employees e,departments dwhere e.department_id=d.department_id;5. Finish this code to produce all information in the departments table whether it has a match in the locations table or not:SELECT l.location_id, l.city, d.department_name ----SELECT l.location_id, l.city, d.department_name from locations l,departments dwhere l.location_id=d.department_id;6. Finish this code to produce the following information for Diana Lorentz:SELECT e.last_name, d.department_name ----select e.last_name,d.department_namefrom employees e,departments dwhere e.last_name='Diana', e.first_name='Lorentz'and e.department_id=d.department_id;7. How do you know which side of a join gets the (+) sign? ----This side has the values that the other doesn't.

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